Sahih al-Bukhari 3592
Book 61: Virtues and Merits of the Prophet (pbuh) and his Companions · Narrated by `Umar bin Taghlib
Arabic
حَدَّثَنَا سُلَيْمَانُ بْنُ حَرْبٍ، حَدَّثَنَا جَرِيرُ بْنُ حَازِمٍ، سَمِعْتُ الْحَسَنَ، يَقُولُ حَدَّثَنَا عَمْرُو بْنُ تَغْلِبَ، قَالَ سَمِعْتُ رَسُولَ اللَّهِ صلى الله عليه وسلم يَقُولُ " بَيْنَ يَدَىِ السَّاعَةِ تُقَاتِلُونَ قَوْمًا يَنْتَعِلُونَ الشَّعَرَ، وَتُقَاتِلُونَ قَوْمًا كَأَنَّ وُجُوهَهُمُ الْمَجَانُّ الْمُطْرَقَةُ ".
English translation
Narrated `Umar bin Taghlib:I heard Allah's Messenger (ﷺ) saying, "Near the Hour you will fight with people who will wear hairy shoes; and you will also fight people with flat faces like shields
Reference: Sahih al-Bukhari 3592, Book of Virtues and Merits of the Prophet (pbuh) and his Companions. English translation by Dr. Muhammad Muhsin Khan.